Object Detector Block

One-shot DETR (Xenova/detr-resnet-50) object detection on an uploaded image, the bundled sample, or a webcam-captured still — color-coded bounding boxes, a unique-label legend, an N-found count, a ranked scored list, in-flight download progress with cancel, clear-to-reset, and dismiss+retry — plus a live MediaPipe BlazeFace webcam face loop with a numeric face count and captured-still overlay. Fully on-device; models download only behind explicit actions. Split from ui/blocks/vision-lab (Detect tab).